BALTIMORE (AP) — Federal prosecutors say 13 female correctional officers, seven inmates and five others with gang ties have been charged with plotting to smuggle drugs, cellphones and other contraband into the Baltimore jail and other corrections facilities.

An indictment unsealed Tuesday said the ring also involved sex between inmates and guards that led to four of the officers becoming pregnant by Tavon White, leader of a jailhouse gang called the Black Guerrilla Family. He is held at the Baltimore City Detention Center, awaiting trial on a charge of attempted murder.

The indictment claims the gang ran the scheme from inside the detention center and charges gang members and corrections officers with conspiracy, drug possession and distribution and money laundering.